@Test
 public void whenOptionalPercentIsOneHundredThenShouldGenerateValue()
     throws RandomizerSkipException {
   optionalRandomizer = new OptionalRandomizer<String>(new FirstNameRandomizer(), 100);
   assertThat(optionalRandomizer.getRandomValue()).isNotNull().isNotEmpty();
 }
 @Test(expected = RandomizerSkipException.class)
 public void whenOptionalPercentIsZeroThenShouldThrowSkipException()
     throws RandomizerSkipException {
   optionalRandomizer = new OptionalRandomizer<String>(new FirstNameRandomizer(), 0);
   optionalRandomizer.getRandomValue();
 }